- Tamiya TB Evolution V - RCTouringcarRacer - Nexus Indoor Carpet - 2008 -

 

Track: Nexus Indoor Carpet
Track Condition: Mid-High Traction with groove

Front:

Upper arm position on bulkhead 1
Upper arm spacer on bulkhead 3mm
Damper position on tower 2
Suspension mount spacer 1.5mm, front & rear
Damper position on suspension arm 1
*Used original LWT arms for more stability
*Used 46mm steel axles
Front droop 5mm
Front Caster 4º
Camber -2º
Ground Clearance 5mm
Front Drive Direct
NO stabilizer
No wheel spacer
Urethane bushing in damper 1
Damper piston 3 hole
Damper oil 40wt Associated
Damper Spring Tamiya Blue *from the original tuned spring kit*
Front toe angle +1º
Front suspension mounts D front, A rear
Front suspension arm spacer 3mm
Ackerman spacer 3mm
Steering knuckle Ackerman position 2
*used stand 5.5mm ball stud in steering knuckles with no hex head

Rear:

Upper arm position on bulkhead 1
Upper arm spacer on bulkhead 1mm
Damper position on shock tower 2
Upper arm position on rear carrier B
Upper arm Spacer on carrier 2.7mm
Damper position on suspension arm 1
*used original LWT suspension arms for stability
*used 46mm aluminum axles
Suspension mount spacer 1.5mm, front & rear
Rear droop 6mm
Rear axles -1º aluminum carriers
Camber -2º
Ground clearance 5.25mm
NO stabilizer
No wheel spacer
Urethane bushing in damper 1
Damper piston 3 hole
Damper oil 40wt Associated
Damper spring Yellow kit spring
Rear toe angle -3º
Rear suspension mounts X front, D rear
Rear suspension arm spacer 1mm

General Settings:

Motor 13.5BL Novak
Battery LIPO
Body DNA 1
Wing STD
Tires Sweep 28LP
Wheels Proline AXIS 26mm
Tire Insert Sweep Medium

I always thought (or was led to believe) that 3 degrees of rear toe was excessive and simply robbed straight-line speed. What's the rationale for this?

The 3º of toe-in in the rear is right at the limit of the amount of toe you would ever want to put into that setting.
I admit it seems a little excessive but so far the set-up is working for me. I had it 2º before and the rear was unsettled going down the straightaway at my track. The new setting has worked so far.

I'm assuming that raising the suspension mounts by 1.5mm raises the roll-centre. What impact does this have on the car?

The roll center change has made the vehicle be able to carry more speed around the corners, the EVO seems more planted through the infield.
Remember I am running a 13.5 BL motor, if your running a less powerful motor you may not need to set your toe as aggressively as I did. The outside track I was going to did not have a straightaway as long the carpet track I am presently running at & I didn't need 3º of toe.

Source: